As for who won the Hacker competition, that situation is unclear right now.
Whoever did win the Hacker competition is making the wise choice (so far) not to let anyone know.
Whoever won it isn’t fessing up about it at the moment, but it’s likely it’s someone from the Foutte side of the house (Fessy, Rockstar, Scottie, Bayleigh or Haleigh).
And that makes sense, as Tyler’s exactly the kind of houseguest someone would want to nominate anonymously, so as not to have to deal with the repercussions from him or his allies.